PATTERSON UTI ENERGY INC

Ticker: PTEN CUSIP: 703481101 Class: Common Stock

MSD Partners, L.P.'s Holding History (CIK: 0001514334)

Note: Option positions (PUT/CALL) are excluded.

Q3 2014

Shares 1,944,955 Value ($000) $63,269 Avg Close $33.96 Range $31.12 - $38.43

Q2 2014

Shares 1,443,822 Value ($000) $50,447 Avg Close $32.83 Range $30.24 - $35.42

Q1 2014

Shares 863,377 Value ($000) $27,352 Avg Close $27.81 Range $24.37 - $31.95

Q4 2013

Shares 1,024,552 Value ($000) $25,942 Avg Close $23.93 Range $21.29 - $26.09

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2014	1,944,955	$63,269	$33.96	$31.12 - $38.43
Q2 2014	1,443,822	$50,447	$32.83	$30.24 - $35.42
Q1 2014	863,377	$27,352	$27.81	$24.37 - $31.95
Q4 2013	1,024,552	$25,942	$23.93	$21.29 - $26.09